| Mineral resources is not only an important part of our country's national economic construction,but also an important material basis for the rapid development of society and human production of life,however,the development and utilization of mineral resources has induced many geological environmental problems in mines,such as subsidence basins,vegetation degradation,air pollution,water pollution,etc.These problems have largely restricted the development of national economy and threatened the living environment of mankind.Nowadays,in order to respond to the call for the construction of ecological civilization and the construction of green mines,the previous fragmented deployment and single-professional mine geological environment survey and evaluation are difficult to meet the new requirements.Therefore,the comprehensive evaluation of the mine geological environment has important practical significance.This article takes the Mataihao coal mine as the research object,and uses remote sensing data and actual measurement data as well as various relevant mining and geological data to carry out a comprehensive evaluation of the mine's geological environment.The main research content and conclusions of the thesis are as follows:(1)Use Sentinel-2A data to extract the mine development area,vegetation coverage,and land desertification degree information;use Digital Elevation Model(DEM)data to extract topography and landform information in the study area;use Sentinel-1A data to identify and extract the subsidence area of goaf;evaluate air pollution,surface water enviromental quality,and aquifer damage through calculation and analysis of measured data in the study area.(2)According to the principles of comprehensive evaluation index selection for mine geological environment and previous studies,combining with the actual situation of the study area and the opinions of relevant experts,a comprehensive evaluation system of mine geological environment including 4 elements and 14 indicators has been established.(3)In order to avoid the subjective weighting method—Analytic Hierarchy Process(AHP),which has strong subjectivity and is greatly affected by human interference,and the objective weighting method—entropy weight method which ignores the problems of comparison between indicators and strong objectivity,etc.It is proposed to use the comprehensive weight method—"multiplicative integration method" to combine subjective and objective weights to determine the comprehensive weights of various indicators in the comprehensive evaluation system of mine geological environment,and to ensure that the comprehensive weights obtained are scientific,reasonable and reliable.(4)Respectively based on the subjective weight,objective weight and fuzzy comprehensive evaluation method of comprehensive weight to overall situation of the study area,and using the method of grid based on the three weighting analysis.Through the use of remote sensing images and field investigation to determine that the fuzzy comprehensive evaluation based on the comprehensive weights and grid method based on the comprehensive weight partition are more in line with the actual situation of the study area.It is explained that the fuzzy comprehensive evaluation method based on comprehensive weight and the grid method based on comprehensive weight are scientific and accurate.(5)The evaluation results shows that the comprehensive evaluation grade of the mine geological environment in the study area is level ?(good),and the level ?(very good)area accounts for 39.12%of the study area,the level ?(good)area accounts for 58.09%of the study area,the level ?(relatively poor)area accounts for 1.98%of the study area,and the level ?(poor)area accounts for 0.8%of the study area.According to the evaluation results,reasonable suggestions and protection measures for the mine geological environment in the study area are put forward,which lays the foundation for the construction of a safe,green and harmonious mine geological environment,and provides a theoretical basis for sustainable mining and subsequent planning in the mining area. |
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